Hi, first wanted to say thank you for providing such a great forum! I bought a home with an inground pool last year. I took it over in August so I didn't do any testing with the water because it stayed clear until I closed it. After reading through your suggestions I now know that was a mistake.
Anyway, I opened the pool and got it all clear within a week but I didn't realize the ph was low (about 6.0) until I took the water for testing. I had the pool sparkling clear with no stains one day and then the next day it was sparkling clean with these tannish/orangish stains at the bottom of the pool (mostly in the deep end).
I have an inground vinyl pool 3-12 ft deep with approx. 28000 gallons. My levels are as follows:
FC - 8.35, TC- 8.35, CC- 0, ph- 7.6, TH- 231, TA- 162, CYA- 56, Copper- .82, TDS- 1340. I have done a treatment for the copper with 11oz of les iron and after retesting with 32oz of jacksmagic blue but the level is still high.
I just bought a jack's magic stain test kit but after reading it says to adjust my levels and before I bother doing any of that I wanted to look for suggestions here first. I foolishly ran the heater to the pool while the PH was low (not knowing that it was an issue) and I believe that is what is contributing to the copper as my heater now needs service.
Thanks in advance for your help!